[Konstantinos]

OnPlayerClickMap is a callback. Remove the function and add this to the gamemode:

pawn Код:

public OnPlayerClickMap(playerid, Float:fX, Float:fY, Float:fZ)
{
    SetPlayerPosFindZ(playerid, fX, fY, fZ); 
    return 1;
}

For better results about the Z (height) parameter, you can use MapAndreas.